Ключевые слова: accident, alert, alertness, background, banner, build, builder, care, careful, caution, concept, construction, danger, dangerous, emergency, employee, engineering, entrance, factory, first, helmet, industrial, information, instructions, isolated, job, label, labor, precaution, prevention, protect, protection, protective, regulation, risk, risky, safe, safeguard, safety, secure, security, sign, site, symbol, unsafe, warn, warning, wear, white, worker,